Surname Ratnayake (Ratnayake 
) , in the world, is a common last name. The cognomen Ratnayake is habitual in Sri Lanka, where it is a common surname, Eswatini, where it is quite a common surname, and United Arab Emirates, where it is quite a rare surname. Measured by absolute frequency, it most frequently occurs in Sri Lanka, Australia, and United Arab Emirates. Much less frequently, Ratnayake is the forename as well as the last name.
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| Ratnayake | Australia, United Arab Emirates, Indonesia, United States, Sri Lanka |
| may ratnayake Sri Lankan physician (b. 1892) |
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premil ratnayake (b. 1933) |
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| s. w. d. ratnayake Sri Lankan politician, LK (b. 1901) |
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| v. g. w. ratnayake (b. 1908) |
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| kiri banda ratnayake Sri Lankan politician (1924-2004), LK (b. 1924) |
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| rita ratnayake Sri Lankan actress, LK (b. 1934) |
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| susantha c. ratnayake Chairman - John Keells Holdings Plc (b. 1958) |
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| janaka ratnayake Sri Lankan entrepreneur (born 1964) (b. 1964) |
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| vasanthi ratnayake Sri Lankan former cricketer, LK (b. 1973) |
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| wishrawana s ratnayake researcher ORCID ID = 0000-0002-6893-6206 |
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| anokha s ratnayake researcher (ORCID 0000-0002-9487-9751) |
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| himali erandathie ratnayake researcher (ORCID 0000-0003-0132-806X) |
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| amila ratnayake researcher (ORCID 0000-0002-2678-2667) |
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| g. ratnayake researcher ORCID ID = 0000-0003-4320-3601 |
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| r.m. chandima ratnayake researcher ORCID ID = 0000-0003-2222-8199 |
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